diff --git a/rtgui/bayerprocess.cc b/rtgui/bayerprocess.cc
index 7491d3896..2a65a158e 100644
--- a/rtgui/bayerprocess.cc
+++ b/rtgui/bayerprocess.cc
@@ -251,6 +251,10 @@ BayerProcess::BayerProcess () : FoldableToolPanel(this, "bayerprocess", M("TP_RA
 
 }
 
+BayerProcess::~BayerProcess ()
+{
+    idle_register.destroy();
+}
 
 void BayerProcess::read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited)
 {
diff --git a/rtgui/bayerprocess.h b/rtgui/bayerprocess.h
index d72d82cc4..b0974e7a4 100644
--- a/rtgui/bayerprocess.h
+++ b/rtgui/bayerprocess.h
@@ -70,6 +70,7 @@ protected:
 public:
 
     BayerProcess ();
+    ~BayerProcess ();
 
     void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
     void write(rtengine::procparams::ProcParams* pp, ParamsEdited* pedited = nullptr);
diff --git a/rtgui/xtransprocess.cc b/rtgui/xtransprocess.cc
index 1bb5303b0..47556e54f 100644
--- a/rtgui/xtransprocess.cc
+++ b/rtgui/xtransprocess.cc
@@ -97,6 +97,9 @@ XTransProcess::XTransProcess () : FoldableToolPanel(this, "xtransprocess", M("TP
     methodconn = method->signal_changed().connect( sigc::mem_fun(*this, &XTransProcess::methodChanged) );
 }
 
+XTransProcess::~XTransProcess () {
+    idle_register.destroy();
+}
 
 void XTransProcess::read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited)
 {
diff --git a/rtgui/xtransprocess.h b/rtgui/xtransprocess.h
index 9c958a10c..7a706b1ac 100644
--- a/rtgui/xtransprocess.h
+++ b/rtgui/xtransprocess.h
@@ -46,6 +46,7 @@ protected:
 public:
 
     XTransProcess ();
+    ~XTransProcess ();
 
     void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
     void write(rtengine::procparams::ProcParams* pp, ParamsEdited* pedited = nullptr);